javascript 的trim 函数在firefox 下面使用没有问题
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<script language= "javascript" > var test1 = " aa " ; test1 = test1.toString(); test1 = test1.trim(); </script> |
在火狐下这样用没有问题, 但是在IE下就报错
那么我们可以修改一下
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String.prototype.trim= function (){ return this .replace(/(^\s*)|(\s*$)/g, "" );} |
在头上加上这一句,上面的就可以在IE和FF下都可以运行了
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<script language= "javascript" > String.prototype.trim= function (){ return this .replace(/(^\s*)|(\s*$)/g, "" );} var test1 = " aa " ; test1 = test1.toString(); test1 = test1.trim(); </script> |
JQuery提供的方法:
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<!DOCTYPE html> <html> <head> <script src= "http://code.jquery.com/jquery-latest.js" ></script> </head> <body> <button>Show Trim Example</button> <script> $( "button" ).click( function () { var str = " lots of spaces before and after " ; alert( "'" + str + "'" ); str = jQuery.trim(str); alert( "'" + str + "' - no longer" ); }); </script> </body> </html> |