JS处理空格

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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