常用js,不断更新中...

1.日期大小比较<br>var regS &＃61; new RegExp("-","gi");<br>var bvalue&＃61;document.all("today").value.replace(regS,"/");<br>var evalue&＃61;document.all("providerConfirmValidity").value.replace(regS,"/");<br>var d1 &＃61; new Date(bvalue);<br>var d2 &＃61; new Date(evalue);<br>if(Date.parse(d1) - Date.parse(d2)>&＃61;0){<br>alert("有效确认时间必须大于当前时间 !");<br>document.all("providerConfirmValidity").focus();<br>return false;<br>}<br>2.只能输入数字的文本框&＃xff08;非数字自动回退&＃xff09;。<br><input type&＃61;&＃39;text&＃39; name&＃61;&＃39;netMatCount&＃39; size&＃61;&＃39;8&＃39; οnkeyup&＃61;"this.value&＃61;this.value.replace(/[^/d/.]/g,&＃39;&＃39;)" onbeforepaste&＃61;"clipboardData.setData<br>(&＃39;text&＃39;,clipboardData.getData(&＃39;text&＃39;).replace(/^(-|/&＃43;)?(/d&＃43;/./d&＃43;)$/,&＃39;&＃39;))" /><br>var price &＃61; /^/d&＃43;(/./d{1,4})?$/;<br>if(!price.test(form1.netMatCount.value)){<br>alert("请填写需求数量 &＃xff01;");<br>return false;<br>}<br>/** <br>* 文本框只允许输入数字或小数点时调用此方法。 <br>* obj&＃xff1a;文本框对象 <br>*/ <br>function clearNoNum(obj){ <br>if(inNaN(obj.value)) { <br>obj.value &＃61; obj.value.replace(/[^/d.]/g,""); //先把非数字的都替换掉&＃xff0c;除了数字和. <br>obj.value &＃61; obj.value.replace(/^/./g,"");//必须保证第一个为数字而不是. <br>obj.value &＃61; obj.value.replace(//.{2,}/g,"."); //保证只有出现一个.而没有多个. <br>//保证.只出现一次&＃xff0c;而不能出现两次以上 <br>obj.value &＃61; obj.value.replace(".","$#$").replace(//./g,"").replace("$#$","."); <br>} <br>}<br>3.一组复选框&＃xff0c;至少必须有一项选中<br>function selectOne(checkboxName,describe){<br>for(var i&＃61;1;i<checkboxName.length;i&＃43;&＃43;){<br>if(checkboxName[i].checked&＃61;&＃61;true){<br>return true;<br>}<br>}<br>alert("请选择" &＃43; describe &＃43; "&＃xff01;");<br>return false;<br>}<br>4.验证一个在某个区间的正整数<br>function isAreaInt(myString,min,max){<br>if(!isInt(myString)){<br>return false;<br>}<br>if(parseInt(myString)>max||parseInt(myString)<min){<br>return false;<br>}<br>return true;<br>}<br>5.打开一个窗口&＃xff0c;使窗口出现在屏幕中心位置,有滚动条&＃xff0c;窗口大小可变<br>function winOpen(fileName,winName,winWidth,winHeight){<br>var winName&＃61;window.open(fileName,winName,"top&＃61;" &＃43; (screen.height-winHeight)/2 &＃43; ",left&＃61;" &＃43; (screen.width-winWidth)/2 &＃43; ",width&＃61;" &＃43; winWidth &＃43; <br>",height&＃61;" &＃43; winHeight &＃43; ",scrollbars&＃61;yes,resizable&＃61;yes,location&＃61;no,toolbar&＃61;no,status&＃61;no");<br>winName.focus();<br>}<br>6.打开一个窗口&＃xff0c;使窗口出现在屏幕中心位置,窗口大小固定&＃xff0c;有滚动条<br>function winOpenSizeBar(fileName,winName,winWidth,winHeight){<br>var winName&＃61;window.open(fileName,winName,"top&＃61;" &＃43; (screen.height-winHeight)/2 &＃43; ",left&＃61;" &＃43; (screen.width-winWidth)/2 &＃43; ",width&＃61;" &＃43; winWidth &＃43; <br>",height&＃61;" &＃43; winHeight &＃43; ",scrollbars&＃61;yes,resizable&＃61;no,location&＃61;no,toolbar&＃61;no,status&＃61;no");<br>winName.focus();<br>}<br>7.高亮显示表格中的一行<br>function choose_color(tableId,row,newColor){<br>var bgColor &＃61; "#E1FFFF";<br>if (newColor&&newColor !&＃61; "")<br>{<br>bgColor &＃61; newColor;<br>}<br>var obj &＃61; document.getElementById(tableId);<br>var rowCount &＃61; obj.rows.length;<br>for (var i&＃61;0;i<rowCount; i&＃43;&＃43;){<br>obj.rows(i).style.backgroundColor &＃61; "";<br>}<br>row.style.backgroundColor &＃61; bgColor;<br>}<br><tr height&＃61;"30" align&＃61;"right" οnmοusemοve&＃61;"choose_color(&＃39;firstTable&＃39;,this)"><br>8.去掉字串两边的空格<br>function trim(str)<br>{<br>return lTrim(rTrim(str));<br>}<br>9.email的判断。<br>function ismail(mail)<br>{<br>return(new RegExp(/^/w&＃43;((-/w&＃43;)|(/./w&＃43;))*/&＃64;[A-Za-z0-9]&＃43;((/.|-)[A-Za-z0-9]&＃43;)*/.[A-Za-z0-9]&＃43;$/).test(mail));<br>}<br>10.高亮替换<br>window.onload &＃61; function() {<br>for( var i &＃61; 0; i <document.getElementsByTagName("ol").length; i&＃43;&＃43; ) {<br>nav(document.getElementsByTagName("ol")[i]);<br>}<br>function nav(obj) { <br>for( var i &＃61; 0; i <obj.getElementsByTagName("li").length; i&＃43;&＃43; ) {<br>obj.getElementsByTagName("li")[i].onmousemove &＃61; function() {<br>this.style.background &＃61; "#f8f8f8";<br>this.style.border&＃61; "3px solid #e2762e";<br>}<br>obj.getElementsByTagName("li")[i].onmouseout &＃61; function() {<br>this.style.background &＃61; "#ffffff";<br>this.style.border&＃61; "1px solid #dbdbdb";<br>}<br>}<br>}<br>}<br>11.Table隔行换色、移动换色<br><mce:script language&＃61;"Javascript"></mce:script> <br><mce:script language&＃61;"Javascript"></mce:script> <br>12.Span装载数据&＃xff0c;超出部分用省略号替换&＃xff0c;鼠标提示<br><span name&＃61;"dd" style&＃61;"width:160px;height:15px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap" οnmοuseοver&＃61;"this.title&＃61;this.innerText"><br>测试标准长度&＃xff0c;超出部分用省略号替换。<br></span><br>