js中跳转页面的方法

第一种： 

<script language="javascript" type="text/javascript"> window.location.href="jb51.jsp?backurl="+window.location.href; </script> 

第二种： 

<script language="javascript"> alert("返回"); window.history.back(-1); </script> 

第三种：

<script language="javascript"> window.navigate("jb51.jsp"); </script> 

第四种：

<script language="JavaScript"> self.location='jb51.htm'; </script> 

第五种： 

<script language="javascript"> alert("非法访问！"); top.location='jb51.jsp'; </script> 

第六种：网址从传参获得并转向 

<script language="javascript" type="text/javascript"> function request(paras){ var url = location.href; var paraString = url.substring(url.indexOf("?")+1,url.length).split("&"); var paraObj = {} for (i=0; j=paraString[i]; i++){ paraObj[j.substring(0,j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=")+1,j.length); } var returnValue = paraObj[paras.toLowerCase()]; if(typeof(returnValue)=="undefined"){ return ""; }else{ return returnValue; } } var theurl theurl=request("url"); if (theurl!=''){ location=theurl } </script>