JS UrlEncode UrlDecode

function str2asc(strstr){return ("0"+strstr.charCodeAt(0).toString(16)).slice(-2);}function UrlEncode(str){var ret="";var strSpecial="!\"#$%&'()*+,/:;<=>?[]^`{|}~%";var tt= "";for(var i=0;i<str.length;i++){var chr = str.charAt(i);var c=str2asc(chr);tt += chr+":"+c+"n";if(parseInt("0x"+c) > 0x7f){ret+="%"+c.slice(0,2)+"%"+c.slice(-2);}else{if(chr==" ")ret+="+";else if(strSpecial.indexOf(chr)!=-1)ret+="%"+c.toString(16);elseret+=chr;}}return ret;}function asc2str(ascasc){return String.fromCharCode(ascasc);}function UrlDecode(str){var ret="";for(var i=0;i<str.length;i++){var chr = str.charAt(i);if(chr == "+"){ret+=" ";}else if(chr=="%"){var asc = str.substring(i+1,i+3);if(parseInt("0x"+asc)>0x7f){ret+=asc2str(parseInt("0x"+asc+str.substring(i+4,i+6)));i+=5;}else{ret+=asc2str(parseInt("0x"+asc));i+=2;}}else{ret+= chr;}}return ret;}