Take User input to perform calculation in javascript -


i have written piece of code not working. want use value entered user perform following calculation...

function calculatebasic()  		{  			var uservalue = form.size.value;  			var powerfororganic = math.pow(uservalue,1.05);  			var effortfororganic = 2.4 * power;  			var powertdevorganic = math.pow(effortfororganic,0.38);  			var tdevfororganic =  2.5 * powertdevorganic;  			var averagestafffororganic = effortfororganic / tdevfororganic;  			var productivitylevelfororganic = averagestafffororganic / effortfororganic;  			alert( "effort :" + effortfororganic + "tdev :" + tdevfororganic + "average staff :" + averagestafffororganic + "productivity :" + productivitylevelfororganic);  			  		}
<input type="text" id="size" placeholder="enter size in kloc">  <input type="button" id="enterinfo" value="submit"  onclick="calculatebasic(this.form);">

your line should be

var uservalue = document.getelementbyid("size").value;

power wasn't defined. meant powerfororganic, defined line before.

var effortfororganic = 2.4 * powerfororganic;

here complete code

function calculatebasic() {     var uservalue = number(document.getelementbyid("size").value);     var powerfororganic = number(math.pow(uservalue,1.05));     var effortfororganic = number(2.4 * powerfororganic);     var powertdevorganic = number(math.pow(effortfororganic,0.38));     var tdevfororganic =  number(2.5 * powertdevorganic);     var averagestafffororganic = effortfororganic / tdevfororganic;     var productivitylevelfororganic = averagestafffororganic / effortfororganic;     alert( "effort :" + effortfororganic + "tdev :" + tdevfororganic + "average staff :" + averagestafffororganic + "productivity :" + productivitylevelfororganic);      }  var button = document.getelementbyid("enterinfo");  button.addeventlistener("click", function() {     calculatebasic(); });

http://jsfiddle.net/739amacp/


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