/**** 读取参数from 开始****/
function getfrom(src){
	
	var N = src.indexOf("from=");
	if ( 0 >= N) return -1;
	var I = src.substr(N + 5).length;
	if (0 >= I) return -1;
	return src.substr(src.indexOf("from=") + 5,src.length - src.indexOf("from=") - 5);
}

from = getfrom(document.location.href)
if(from == "")
	from = 4
document.dingyue.from.value = from
/**** 读取参数from 结束****/