起点页面传值js,有空研究学习下_javascript技巧

<script> <BR>function ChangeParam(name, value) { <BR>var url = window.location.href; <BR>var newUrl = ""; <BR>var reg = new RegExp("(^|)" + name + "=([^&]*)(|$)"); <BR>var tmp = name + "=" + value; <BR>if (url.match(reg) != null) { <BR>newUrl = url.replace(eval(reg), tmp); <BR>} <BR>else { <BR>if (url.match("[\?]")) { <BR>newUrl = url + "&" + tmp; <BR>} <BR>else { <BR>newUrl = url + "?" + tmp; <BR>} <BR>} <BR>//如果更换了类别,则从第1页开始 <BR>if (name != "PageIndex") { <BR>reg = new RegExp("(^|)PageIndex=([^&]*)(|$)"); <BR>tmp = "PageIndex=1"; <BR>if (newUrl.match(reg) != null) { <BR>newUrl = newUrl.replace(eval(reg), tmp); <BR>} <BR>} <BR>location.href = newUrl; <BR>} <BR>function QueryMonthTicket() <BR>{ <BR>if($("selectM")!=null && $("selectY")!=null) <BR>{ <BR>var month=$("selectY").value+$("selectM").value; <BR>ChangeParam("Month",month); <BR>} <BR>} <br><br>function GoPage() <BR>{ <BR>var page=$("txtPage").value.trim(); <BR>if(page.length===0){ <BR>alert("请您输入页码"); <BR>return false; <BR>}; <BR>var strNum = '1234567890'; <BR>var isNum = true; <BR>for(var i=0;i<page.length;i+=1){ <BR>var c = page.charAt(i); <BR>if(strNum.indexOf(c) < 0){ <BR>isNum = false; <BR>break; <BR>}; <BR>}; <BR>if(isNum){ <BR>if(parseInt(page)>parseInt(initTotalPage)){ <BR>alert("您输入的页数超过总页数，请重新输入！"); <BR>return false; <BR>}; <BR>ChangeParam("PageIndex",page); <BR>}else alert('您输入的信息有误，请重新输入！'); <BR>} <br><br>function GoEnter(evt){ <BR>evt=evt||window.event; <BR>if(evt && evt.keyCode == 13) return GoPage(); <BR>}; <BR></script>