diff --git a/app/assets/javascripts/ie_lt9.js b/app/assets/javascripts/ie_lt9.js
index 4e45b0282..b10b4b2ff 100644
--- a/app/assets/javascripts/ie_lt9.js
+++ b/app/assets/javascripts/ie_lt9.js
@@ -1,2 +1,3 @@
 //= require respond.min
-//= require rem.min
\ No newline at end of file
+//= require rem.min
+//= require number-polyfill.min
\ No newline at end of file
diff --git a/vendor/assets/javascripts/number-polyfill.min.js b/vendor/assets/javascripts/number-polyfill.min.js
new file mode 100644
index 000000000..b5cea8b09
--- /dev/null
+++ b/vendor/assets/javascripts/number-polyfill.min.js
@@ -0,0 +1 @@
+(function(){(function(e){var t,n;return t=document.createElement("input"),t.setAttribute("type","number"),"text"!==t.type?(e.fn.inputNumber=function(){return e(this)},void 0):(e.fn.inputNumber=function(){return e(this).filter(function(){var t;return t=e(this),t.is('input[type="number"]')&&!(t.parent().is("span")&&t.next().is("div.number-spin-btn-container")&&t.next().children().first().is("div.number-spin-btn-up")&&t.next().children().eq(1).is("div.number-spin-btn-down"))}).each(function(){n.polyfills.push(new n(this))}),e(this)},n=function(t){var i,r,o,s,a=this;if(this.elem=e(t),!(this.elem.is(":root *")&&this.elem.height()>0))throw Error("Element must be in DOM and displayed so that its height can be measured.");s=this.elem.outerHeight()/2+"px",this.upBtn=e("<div/>",{"class":"number-spin-btn number-spin-btn-up",style:"height: "+s}),this.downBtn=e("<div/>",{"class":"number-spin-btn number-spin-btn-down",style:"height: "+s}),this.btnContainer=e("<div/>",{"class":"number-spin-btn-container"}),i=e("<span/>",{style:"white-space: nowrap"}),this.upBtn.appendTo(this.btnContainer),this.downBtn.appendTo(this.btnContainer),this.elem.wrap(i),this.btnContainer.insertAfter(this.elem),this.elem.on({focus:function(){a.elem.on({DOMMouseScroll:n.domMouseScrollHandler,mousewheel:n.mouseWheelHandler},{p:a})},blur:function(){a.elem.off({DOMMouseScroll:n.domMouseScrollHandler,mousewheel:n.mouseWheelHandler})}}),this.elem.on({keypress:n.elemKeypressHandler,change:n.elemChangeHandler},{p:this}),this.upBtn.on("mousedown",{p:this,func:"increment"},n.elemBtnMousedownHandler),this.downBtn.on("mousedown",{p:this,func:"decrement"},n.elemBtnMousedownHandler),this.elem.css("textAlign","right"),this.attrMutationHandler("class"),"undefined"!=typeof WebKitMutationObserver&&null!==WebKitMutationObserver||r!==void 0&&null!==r?("undefined"==typeof WebKitMutationObserver||null===WebKitMutationObserver||void 0!==r&&null!==r||(r=WebKitMutationObserver),o=new r(function(e){var t,n,i;for(n=0,i=e.length;i>n;n++)t=e[n],"attributes"===t.type&&a.attrMutationHandler(t.attributeName,t.oldValue,a.elem.attr(t.attributeName))}),o.observe(t,{attributes:!0,attributeOldValue:!0,attributeFilter:["class","style","min","max","step"]})):"undefined"!=typeof MutationEvent&&null!==MutationEvent&&this.elem.on("DOMAttrModified",function(e){a.attrMutationHandler(e.originalEvent.attrName,e.originalEvent.prevValue,e.originalEvent.newValue)})},n.polyfills=[],n.isNumber=function(e){return null!=e&&"function"==typeof e.toString?/^-?\d+(?:\.\d+)?$/.test(""+e):!1},n.isFloat=function(e){return null!=e&&"function"==typeof e.toString?/^-?\d+\.\d+$/.test(""+e):!1},n.isInt=function(e){return null!=e&&"function"==typeof e.toString?/^-?\d+$/.test(""+e):!1},n.isNegative=function(e){return null!=e&&"function"==typeof e.toString?/^-\d+(?:\.\d+)?$/.test(""+e):!1},n.raiseNum=function(e){var t,i,r;if("number"==typeof e||"object"==typeof e&&e instanceof Number)return e%1?{num:""+e,precision:0}:n.raiseNum(""+e);if("string"==typeof e||"object"==typeof e&&e instanceof String){if(n.isFloat(e))return e=e.replace(/(\.\d)0+$/,"$1"),r=n.getPrecision(e),i=e.slice(0,-(r+1))+e.slice(-r),i=i.replace(/^(-?)0+(\d+)/,"$1$2"),t={num:i,precision:r};if(n.isInt(e))return{num:e,precision:0}}},n.raiseNumPrecision=function(e,n){var i,r;if(n>e.precision){for(t=i=r=e.precision;n>=r?n>i:i>n;t=n>=r?++i:--i)e.num+="0";e.precision=n}},n.lowerNum=function(e){if(e.precision>0){for(;e.num.length<e.precision+1;)e.num=n.isNegative(e.num)?e.num.slice(0,1)+"0"+e.num.slice(1):"0"+e.num;return(e.num.slice(0,-e.precision)+"."+e.num.slice(-e.precision)).replace(/\.?0+$/,"").replace(/^(-?)(\.)/,"$10$2")}return e.num},n.preciseAdd=function(e,t){var i,r,o;if(("number"==typeof e||"object"==typeof e&&e instanceof Number)&&("number"==typeof t||"object"==typeof t&&t instanceof Number))return 0===e%1&&0===t%1?""+(e+t):n.preciseAdd(""+e,""+t);if(("string"==typeof e||"object"==typeof e&&e instanceof String)&&("string"==typeof t||"object"==typeof t&&t instanceof String)){if(n.isNumber(e)){if(n.isNumber(t)){if(n.isInt(e)){if(n.isInt(t))return n.preciseAdd(parseInt(e,10),parseInt(t,10));n.isFloat(t)&&(e+=".0")}else n.isFloat(e)&&n.isInt(t)&&(t+=".0");if(i=n.raiseNum(e),r=n.raiseNum(t),i.precision<r.precision?n.raiseNumPrecision(i,r.precision):i.precision>r.precision&&n.raiseNumPrecision(r,i.precision),o=""+(parseInt(i.num,10)+parseInt(r.num,10)),i.precision>0){if(n.isNegative(o))for(;i.precision>o.length-1;)o="-0"+o.slice(1);else for(;i.precision>o.length;)o="0"+o;o=n.lowerNum({num:o,precision:i.precision})}return o=o.replace(/^(-?)\./,"$10."),n.isFloat(o)&&(o=o.replace(/0+$/,"")),o}throw new SyntaxError('Argument "'+t+'" is not a number.')}throw new SyntaxError('Argument "'+e+'" is not a number.')}return n.preciseAdd(""+e,""+t)},n.preciseSubtract=function(e,t){return"number"==typeof t||"object"==typeof t&&t instanceof Number?n.preciseAdd(e,-t):"string"==typeof t||"object"==typeof t&&t instanceof String?n.isNegative(t)?n.preciseAdd(e,t.slice(1)):n.preciseAdd(e,"-"+t):void 0},n.getPrecision=function(e){var t,i;if("number"==typeof e){for(t=0,i=e;i!==Math.floor(i);)i=e*Math.pow(10,++t);return t}return"string"==typeof e&&n.isNumber(e)?n.isFloat(e)?/^-?\d+(?:\.(\d+))?$/.exec(e)[1].length:0:void 0},n.prototype.getParams=function(){var e,t,i,r;return i=this.elem.attr("step"),t=this.elem.attr("min"),e=this.elem.attr("max"),r=this.elem.val(),n.isNumber(i)||(i=null),n.isNumber(t)||(t=null),n.isNumber(e)||(e=null),n.isNumber(r)||(r=t||0),{min:null!=t?t:null,max:null!=e?e:null,step:null!=i?i:"1",val:null!=r?r:null}},n.prototype.clipValues=function(e,t,n){return null!=n&&parseFloat(e)>parseFloat(n)?n:null!=t&&parseFloat(e)<parseFloat(t)?t:e},n.prototype.stepNormalize=function(e){var t,i,r,o,s;return r=this.getParams(),s=r.step,i=r.min,null==s?e:(s=n.raiseNum(s),t=n.raiseNum(e),t.precision>s.precision?n.raiseNumPrecision(s,t.precision):t.precision<s.precision&&n.raiseNumPrecision(t,s.precision),null!=i&&(t=n.raiseNum(n.preciseSubtract(e,i)),n.raiseNumPrecision(t,s.precision)),0===parseFloat(t.num)%parseFloat(s.num)?e:(t=n.lowerNum({num:""+Math.round(parseFloat(t.num)/(o=parseFloat(s.num)))*o,precision:t.precision}),null!=i&&(t=n.preciseAdd(t,i)),t))},n.domMouseScrollHandler=function(e){var t;t=e.data.p,e.preventDefault(),0>e.originalEvent.detail?t.increment():t.decrement()},n.mouseWheelHandler=function(e){var t;t=e.data.p,e.preventDefault(),e.originalEvent.wheelDelta>0?t.increment():t.decrement()},n.elemKeypressHandler=function(e){var t,n,i;t=e.data.p,38===e.keyCode?t.increment():40===e.keyCode?t.decrement():8!==(n=e.keyCode)&&9!==n&&35!==n&&36!==n&&37!==n&&39!==n&&46!==n&&45!==(i=e.which)&&46!==i&&48!==i&&49!==i&&50!==i&&51!==i&&52!==i&&53!==i&&54!==i&&55!==i&&56!==i&&57!==i&&e.preventDefault()},n.elemChangeHandler=function(e){var t,i,r,o;r=e.data.p,""!==r.elem.val()&&(n.isNumber(r.elem.val())?(o=r.getParams(),i=r.clipValues(o.val,o.min,o.max),i=r.stepNormalize(i),""+i!==r.elem.val()&&r.elem.val(i).change()):(t=r.elem.attr("min"),r.elem.val(null!=t&&n.isNumber(t)?t:"0").change()))},n.elemBtnMousedownHandler=function(t){var n,i,r,o,s=this;i=t.data.p,n=t.data.func,i[n](),o=function(){i[n](),i.timeoutID=window.setTimeout(o,10)},r=function(){window.clearTimeout(i.timeoutID),e(document).off("mouseup",r),e(s).off("mouseleave",r)},e(document).on("mouseup",r),e(this).on("mouseleave",r),i.timeoutID=window.setTimeout(o,700)},n.prototype.attrMutationHandler=function(e){var n,i,r,o,s;if("class"===e||"style"===e){for(i={},n=null,s=["opacity","visibility","-moz-transition-property","-moz-transition-duration","-moz-transition-timing-function","-moz-transition-delay","-webkit-transition-property","-webkit-transition-duration","-webkit-transition-timing-function","-webkit-transition-delay","-o-transition-property","-o-transition-duration","-o-transition-timing-function","-o-transition-delay","transition-property","transition-duration","transition-timing-function","transition-delay"],r=0,o=s.length;o>r;r++)t=s[r],(n=this.elem.css(t))!==this.btnContainer.css(t)&&(i[t]=n);i.display="none"===this.elem.css("display")?"none":"inline-block",this.btnContainer.css(i)}else("min"===e||"max"===e||"step"===e)&&this.elem.change()},n.prototype.increment=function(){var e,t;this.elem.is(":disabled")||this.elem.is("[readonly]")||(t=this.getParams(),e=n.preciseAdd(t.val,t.step),null!=t.max&&parseFloat(e)>parseFloat(t.max)&&(e=t.max),e=this.stepNormalize(e),this.elem.val(e).change())},n.prototype.decrement=function(){var e,t;this.elem.is(":disabled")||this.elem.is("[readonly]")||(t=this.getParams(),e=n.preciseSubtract(t.val,t.step),null!=t.min&&parseFloat(e)<parseFloat(t.min)&&(e=t.min),e=this.stepNormalize(e),this.elem.val(e).change())},e(function(){e('input[type="number"]').inputNumber()}),void 0)})(jQuery)}).call(this);
\ No newline at end of file