function checnum(as)
{
	var dd = as.value;
	
	if(isNaN(dd))
	{
		dd = dd.substring(0,(dd.length-1));
		as.value = dd;
	}		
}

function calsi()
{
	var ty = document.new.ss.value;
	var r = document.new.res1.value;
	var m = document.new.res2.value;
	var t  = document.new.res3.value;
	var g = 6.6726;

	if(ty == 1)
		r = null;
	if(ty == 2)
		m = null;
	if(ty == 3)
		t = null;
	
	if(r == "" || m == "" || t == "")
	{
		alert(" Please enter all required feilds ");
	}

	if(r != null && m != null){
		t = Math.round(Math.sqrt((39.44*r*r*r*100000000000)/(g*m))*100)/100;
		document.new.res3.value=t;
	}
	else if(m != null && t != null){
		r = Math.round(Math.pow(((t*t*g*m)/(39.44*100000000000)),1/3)*100)/100;
		document.new.res1.value=r;
	}
	else if(r != null && t != null){
		m = Math.round(((39.44*r*r*r*100000000000)/(g*t*t))*100)/100;
		document.new.res2.value=m;
	}
	
	return false;
}

function modf()
{
	for(var h=1; h<4; h++)
	{
		var dd = "document.new.res"+h;
		ss = eval(dd);
		ss.disabled=false;
		ss.style.backgroundColor="#eefaff";
		ss.style.color= "#000000";
	}
	var vv = document.new.ss.value;
	sse(vv);
}

function sse(vv){
	var dd = "document.new.res"+vv;
	ss = eval(dd);
	ss.disabled=true;
	ss.value="";
	ss.style.color= "black";
	ss.style.backgroundColor="#bbc7dd";
}

function color(test)
{
	var myI=document.getElementsByTagName("input").item(4);
	myI.style.backgroundColor=test;
}


function color1(test)
{
var myI=document.getElementsByTagName("table").item(0);
//myI.setAttribute("style",ch);
myI.style.backgroundColor=test;
}