js获取固定长度的字符(包括中英文混合)

function GetStrLength(data)

{

var charCount = 0;

for(var i =0; i

{

var str=data.charAt(i);

 

//if(/[-A-Z|a-z|0-9]/g.test(str))

if(/[u00-uFF]/g.test(str))

 {

  charCount++;

 }

 else

 {

  charCount+=2;

}

}

return charCount;

}

function GetStrType(data)

{

var charCount = 0;

var chineseCount = 0;

var strType = 0;

for(var i =0; i

{

var str=data.charAt(i);

 if(/[-A-Z|a-z|0-9]/g.test(str))

 {

  charCount++;

 }

 else

 {

  chineseCount++;

}

}

if(chineseCount !=0 && charCount == 0)

{

 strType = 1; //纯汉字

}

else if(charCount !=0 && chineseCount == 0)

{

strType = 2; //纯数字或者字符

}

return strType;

}

function GetStrData(data, len)

{

var charCount = 0;

var strchar="";

for(var i =0; i

{

var str=data.charAt(i);

strchar =strchar+str;

//if(/[-A-Z|a-z|0-9]/g.test(str))

if(/[u00-uFF]/g.test(str))

 {

  charCount++;

 }

 else

 {

  charCount = charCount + 2;

}

if(len - charCount <1)

{

 break; 

}

}

return strchar;

}

function SetSignature(newSignature)

{

var signature = document.getElementById('signature');

signature.setAttribute('title', newSignature);

var str= new String(newSignature);

 var strText;

 var strLen = 34;

    if(GetStrType(str)== 1)

    {

      strLen = 38;

    }

  

    var tmpLen = GetStrLength(str);

if(tmpLen > strLen)

{

var strtemp = GetStrData(str, strLen);

 strText= strtemp+"...";

}

else

{

strText = newSignature;

}  

    signature.innerText = strText;

  // signature.innerText = (newSignature.length > 20) ? newSignature.substr(0, 20) + "..." : newSignature;

}

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