常用js, 不断更新中...

1.日期大小比较var regS = new RegExp("-","gi");var bvalue=document.all("today").value.replace(regS,"/");var evalue=document.all("providerConfirmValidity").value.replace(regS,"/");var d1 = new Date(bvalue);var d2 = new Date(evalue);if(Date.parse(d1) - Date.parse(d2)>=0){alert("有效确认时间必须大于当前时间 !");document.all("providerConfirmValidity").focus();return false;}2.只能输入数字的文本框（非数字自动回退）。<input type='text' name='netMatCount' size='8' onkeyup="this.value=this.value.replace(/[^/d/.]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/^(-|/+)?(/d+/./d+)$/,''))" />var price = /^/d+(/./d{1,4})?$/;if(!price.test(form1.netMatCount.value)){alert("请填写需求数量 ！");return false;}/** * 文本框只允许输入数字或小数点时调用此方法。 * obj：文本框对象 */ function clearNoNum(obj){ if(inNaN(obj.value)) { obj.value = obj.value.replace(/[^/d.]/g,""); //先把非数字的都替换掉，除了数字和. obj.value = obj.value.replace(/^/./g,"");//必须保证第一个为数字而不是. obj.value = obj.value.replace(//.{2,}/g,"."); //保证只有出现一个.而没有多个. //保证.只出现一次，而不能出现两次以上 obj.value = obj.value.replace(".","$#$").replace(//./g,"").replace("$#$","."); } }3.一组复选框，至少必须有一项选中function selectOne(checkboxName,describe){for(var i=1;i<checkboxName.length;i++){if(checkboxName[i].checked==true){return true;}}alert("请选择" + describe + "！");return false;}4.验证一个在某个区间的正整数function isAreaInt(myString,min,max){if(!isInt(myString)){return false;}if(parseInt(myString)>max||parseInt(myString)<min){return false;}return true;}5.打开一个窗口，使窗口出现在屏幕中心位置,有滚动条，窗口大小可变function winOpen(fileName,winName,winWidth,winHeight){var winName=window.open(fileName,winName,"top=" + (screen.height-winHeight)/2 + ",left=" + (screen.width-winWidth)/2 + ",width=" + winWidth + ",height=" + winHeight + ",scrollbars=yes,resizable=yes,location=no,toolbar=no,status=no");winName.focus();}6.打开一个窗口，使窗口出现在屏幕中心位置,窗口大小固定，有滚动条function winOpenSizeBar(fileName,winName,winWidth,winHeight){var winName=window.open(fileName,winName,"top=" + (screen.height-winHeight)/2 + ",left=" + (screen.width-winWidth)/2 + ",width=" + winWidth + ",height=" + winHeight + ",scrollbars=yes,resizable=no,location=no,toolbar=no,status=no");winName.focus();}7.高亮显示表格中的一行function choose_color(tableId,row,newColor){var bgColor = "#E1FFFF";if (newColor&&newColor != ""){bgColor = newColor;}var obj = document.getElementById(tableId);var rowCount = obj.rows.length;for (var i=0;i< rowCount; i++){obj.rows(i).style.backgroundColor = "";}row.style.backgroundColor = bgColor;}<tr height="30" align="right" onmousemove="choose_color('firstTable',this)">8.去掉字串两边的空格function trim(str){return lTrim(rTrim(str));}9.email的判断。function ismail(mail){ return(new RegExp(/^/w+((-/w+)|(/./w+))*/@[A-Za-z0-9]+((/.|-)[A-Za-z0-9]+)*/.[A-Za-z0-9]+$/).test(mail));}10.高亮替换window.onload = function() {for( var i = 0; i < document.getElementsByTagName("ol").length; i++ ) {nav(document.getElementsByTagName("ol")[i]);}function nav(obj) {for( var i = 0; i < obj.getElementsByTagName("li").length; i++ ) {obj.getElementsByTagName("li")[i].onmousemove = function() {this.style.background = "#f8f8f8";this.style.border= "3px solid #e2762e";}obj.getElementsByTagName("li")[i].onmouseout = function() {this.style.background = "#ffffff";this.style.border= "1px solid #dbdbdb";}}}}11.Table隔行换色、移动换色<mce:script language="javascript"><!--function senfe(o,a,b,c,d){var t=document.getElementById(o).getElementsByTagName("tr");for(var i=0;i<t.length;i++){t[i].style.backgroundColor=(t[i].sectionRowIndex%2==0)?a:b;t[i].onclick=function(){if(this.x!="1"){this.x="1";this.style.backgroundColor=d;}else{this.x="0";this.style.backgroundColor=(this.sectionRowIndex%2==0)?a:b;}}t[i].onmouseover=function(){if(this.x!="1")this.style.backgroundColor=c;}t[i].onmouseout=function(){if(this.x!="1")this.style.backgroundColor=(this.sectionRowIndex%2==0)?a:b;}}}// --></mce:script> <mce:script language="javascript"><!--//senfe("表格名称","奇数行背景","偶数行背景","鼠标经过背景","点击后背景");senfe("changecolor","#f3f8fd","#ffffff","#ADADAD","#f391a9");// --></mce:script>12.Span装载数据，超出部分用省略号替换，鼠标提示<span name="dd" style="width:160px;height:15px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap" onmouseover="this.title=this.innerText">测试标准长度，超出部分用省略号替换。</span>