JS处理空格

2010-10-27 11:48:32| 分类：技术-JS | 标签：js 空格 |字号订阅

/*删除两侧空格*/
function trim(ui){
        var notValid=/(^s)|(s$)/;
        while(notValid.test(ui)){
                ui=ui.replace(notValid,"");
        }
        return ui;
}

/*删除前导空格*/
function leftTrim(ui){
        var notValid=/^s/;
        while(notValid.test(ui)){
                ui=ui.replace(notValid,"");
        }
        return ui;
}

/*删除后置空格*/
function rightTrim(ui){
        var notValid=/s$/;
        while(notValid.test(ui)){
                ui=ui.replace(notValid,"");
        }
        return ui;
}

/*删除所有空格*/
function allTrim(ui){
        var notValid=/s/;
        while(notValid.test(ui)){
                ui=ui.replace(notValid,"");
        }
        return ui;
}

/*是否包含前导空格*/
function isLeftSpace(ui) {
var valid=/^s/;
return (valid.test(ui));
}

/*是否包含后置空格*/
function isRightSpace(ui) {
var valid=/s$/;
return (valid.test(ui));
}

/*是否任何一侧包含空格*/
function isBothSpace(ui) {
var valid=/(^s)|(s$)/;
return (valid.test(ui));
}

/*是否包含空格*/
function isIncSpace(ui) {
var valid=/s/;
return (valid.test(ui));
}

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<SCRIPT LANGUAGE="JavaScript">
<!--
//出处:网上搜集
// Trim() , Ltrim() , RTrim()
String.prototype.Trim = function()
{
return this.replace(/(^s*)|(s*$)/g, "");
}
String.prototype.LTrim = function()
{
return this.replace(/(^s*)/g, "");
}
String.prototype.RTrim = function()
{
return this.replace(/(s*$)/g, "");
}
String.prototype.AllTrim = function()
{
var str = document.getElementById('space').value;
var notValid=/s/;
while(notValid.test(str)){
str=str.replace(notValid,"");
}
return str;
}

//-->
</SCRIPT>
<input type="text" value=" 前后都是空格 " id="space">
<input type="button" value="去前后空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.Trim();document.getElementById('space').select();">
<input type="button" value="去前空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.LTrim();document.getElementById('space').select();">
<input type="button" value="去后空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.RTrim();document.getElementById('space').select();">
<input type="button" value="去所有空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.AllTrim();document.getElementById('space').select();">
<input type="button" value="还原" onclick="javascript:document.getElementById('space').value=' 前后都是空格 ';">
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