Some good function script codes in javascript_javascript skills

js function to calculate character length

Copy code The code is as follows:

function LEN(str){
var i,sum=0;
for(i=0;iif((str.charCodeAt(i)> ;=0) && (str.charCodeAt(i)<=255))
sum=sum 1;
else
sum=sum 2;
}
return sum;
}

js function to remove spaces before and after characters

Copy code The code is as follows:

function TRIM(value){return value.replace(/^s*/,'').replace(/s*$/,''); }

Image adaptive size function code

Copy code The code is as follows:

function imgAutoFit(imgObj,maxWidth,maxHeight){
var heightWidth;
var widthHeight;
heightWidth = imgObj.offsetHeight/imgObj.offsetWidth;
widthHeight = im gObj.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        //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 = "点击看原图";
    }
}

function inputContent(theQ,oldContent,re,p){
    var o,oA=["msgframeamend","pingJiaFrame","touSuFrame"];
    for(o in oA){
        if($(oA[o])){
            theQ.editIframe(oA[o]);
            if("msgframeamend"==oA[o]) setTimeout(function(){$(oA[o]).contentWindow.document.body.innerHTML = oldContent.replace(re,"") p[1];},100);
            return;
        }
    }
}

function checkCommon(n,v,t){
    var s = t?"补充提问":"回复内容";
    var o=document.getElementById(n).contentWindow;
    if("msgframereply" == n){
        if(v == ""){
            alert("请填写" s " !");
            o.focus();
            return false;
        }
    }
    if(""==v.replace(/|s| /ig,"")&&checkTagIsHave(v,"img")){
        alert("针对图片，请附上一些说明性的文字！");
        o.focus();
        return false;
    }
    if(10000        alert(s "超过5000字数限制 !");
        o.focus();
        return false;
    }
    return true;
}