function calculate(obj,price){

var reg=/,/g
str=String(document.all.square.value);
str=str.replace(reg, ".");
s=Number(str);
obj=Number(obj);

if (s>0) {
	cols=Math.ceil(s/obj);
	} else {
	cols=0;	
	}
	
	all_price=obj*cols*price;
	all_square=cols*obj;
	
	document.all.square.value=all_square.toFixed(3);	
	eval('document.all.cols_num.innerHTML="'+cols+' רע"');
	eval('document.all.price.innerHTML="'+all_price.toFixed(2)+' דנם"');
}

function calculateevro(obj,price,evro){

var reg=/,/g
str=String(document.all.square.value);
str=str.replace(reg, ".");
s=Number(str);
obj=Number(obj);

if (s>0) {
	cols=Math.ceil(s/obj);
	} else {
	cols=0;	
	}
	
	all_price=obj*cols*price*evro;
	all_square=cols*obj;
	
	document.all.square.value=all_square.toFixed(3);	
	eval('document.all.cols_num.innerHTML="'+cols+' רע"');
	eval('document.all.price.innerHTML="'+all_price.toFixed(2)+' דנם"');
}

function Start(cen,kevro)
{
	var  c;
	c = cen * kevro;
	document.getElementById("sum").innerHTML =  c + " דנם";

}