string reverse

	Its a simple string reverse program. without using string function.
	function stringrev( )
	{
	var restr = "";
	var stname = "";
	var giveme = prompt("give me string", stname);
	document.write("orignal string is :"+ " " +giveme);
	var rev = giveme.length;
	for(var i = rev-1; i >-1; i--)
	{
	restr+= giveme.substr(i,1);
	}
	console.log(restr);
	}
	stringrev( );

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