Some good javascript function script code

Js functions that calculate the character Length
Copy codeThe Code is as follows:
Function LEN (str ){
Var I, sum = 0;
For (I = 0; I <str. length; I ++ ){
If (str. charCodeAt (I) >=0) & (str. charCodeAt (I) <= 255 ))
Sum = sum + 1;
Else
Sum = sum + 2;
}
Return sum;
}

Js functions that remove spaces before and after characters
Copy codeThe Code is as follows:
Function TRIM (value) {return value. replace (/^ \ s */, ''). replace (/\ s * $ /,'');}

Image Adaptive size function code
Copy codeThe Code is as follows:
Function imgAutoFit (imgObj, maxWidth, maxHeight ){
Var heightWidth;
Var widthHeight;
HeightWidth = imgObj. offsetHeight/imgObj. offsetWidth;
WidthHeight = imgObj. offsetWidth/imgObj. offsetHeight;
If (imgObj. offsetWidth> maxWidth ){
ImgObj. width = maxWidth;
ImgObj. height = maxWidth * heightWidth;
}
If (imgObj. offsetHeight> maxHeight ){
ImgObj. height = maxHeight;
ImgObj. width = maxHeight * widthHeight;
}
}

Function checkTagIsHave (s, t ){
Var re = new RegExp ("<\\/? "+ T + "(? :(? : \ S | \\/)(? : \ N |.) *?)?> "," Ig ");
Var r = re. test (s );
Re = null;
Return r;
}

Function imgUploadFit (){
Var u = document. getElementsByName ("imgUploadName ");
If (0 = u. length) return;
For (var I = 0; I <u. length; I ++ ){
// ImgAutoFit (u [I], 560,560 );
ImgAutoFit (u [I], 320,320 );
U [I]. onclick = function () {window. open (this. src );}
U [I]. style. cursor = "pointer ";
U [I]. title = "click to view the source image ";
}
}

Function inputContent (theQ, oldContent, re, p ){
Var o, oA = ["msgframeamend", "pingJiaFrame", "touSuFrame"];
For (o in oA ){
If ($ (oA [o]) {
TheQ. editIframe (oA [o]);
If ("msgframeamend" = oA [o]) settimeout(function()[((oaoaoa.contentdoc Doc ument. body. innerHTML = oldContent. replace (re, "") + p [1];}, 100 );
Return;
}
}
}

Function checkCommon (n, v, t ){
Var s = t? "Supplemental question": "Reply content ";
Var o = document. getElementById (n). contentWindow;
If ("msgframereply" = n ){
If (v = ""){
Alert ("enter" + s + "! ");
O. focus ();
Return false;
}
}
If ("" = v. replace (/<\/*? (? : Img | p | pre | br )(? :(? : \ S | \/)(? : \ N |.) *?)?> | \ S |/ig, "") & checkTagIsHave (v, "img ")){
Alert ("For images, please attach some descriptive text! ");
O. focus ();
Return false;
}
If (10000 <LEN (v )){
Alert (s + "exceeds the limit of 5000 words! ");
O. focus ();
Return false;
}
Return true;
}