javascript error checker

. Call: Accmul (ARG1,ARG2)//return value: Arg1 times Arg2 's exact result function Accmul (arg1,arg2) {var m=0,s1=arg1.tostring (), s2= Arg2.tostring (); Try{m+=s1.split (".") [1].length}catch (e) {} try{m+=s2.split (".") [1].length}catch (e) {} return Number (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10,M)}// Adding a Mul method to the number type is more convenient to call. Number.prototype.mul = function (ARG) {return Accmul (ARG, this);} An additive function that is us

, in determining whether the data type of 2 variables is the same (c) function internal array arguments:First, the array can only be used inside the function, to hold the actual arguments, as an item of the array, see an example below:Operating effect:Arguments.callee is a pointer to the function itself, typically used for function recursion(iv) Local variables and global variablesGlobal variables: Acting on the whole scopeLocal variables: defined in functions, used in function fields Note: Ther

PDF version, English version 158th page,var IsArray = Function.isarray | | Function (o) {return typeof o = = = = "Object" object.prototype.tostring.call (o) = = = "[Object Array]";}; return typeof o = = = "Object" object.prototype.tostring.call (o) = = = "[Object Array]";};Array.isarray is a function provided by ES5, this example is to implement this function in ES3, first, if the browser supports Array.isarray, it is assigned to IsArray, otherwise the subsequent function is assigned to IsArray.

Copy Code code as follows: In IE, there are sometimes "unknown run-time errors" (Unknown runtime error), but not in Firefox. This is mainly the case of IE in the write operation of the innerHTML will check whether the element has to do as the content of the HTML object container requirements, such as if you are in a P containing 1, check your attempt to add to the innerHTML HTML code contains broken HTML tags, such as no 2, change your co

Yesterday, when writing a very simple HTML page with some basic JavaScript scripts, it took 1 hours to find out where the error was. Simply give the following similar code to see if you can find the problem there? Look carefully and then find out. There is a semicolon is entered in Chinese mode, and in Notepad, the difference between the two semicolons is not very obvious, especially in the age of the co

= 0; i ) { function () { // always 5 };}Above is a very common closure problem, click on any div pop-up value always 5var // if there are 5 div on the page for (var i = 0; i ) { (function (w) { function c11> () { /// 0,1,2,3,4 }; }) (i);}ConclusionLearning JavaScript is a lengthy process and cannot be accomplished overnight. I hope this article will introduce some of the content can help students

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migrated directly to the browser support features, so on the Internet to find some solutions that can be directly replaced.Determine browser type $.browser.mozilla =/firefox/.test (Navigator.userAgent.toLowerCase ()); $.browser.webkit =/webkit/.test (Navigator.userAgent.toLowerCase ()); $.browser.opera =/opera/.test (Navigator.userAgent.toLowerCase ()); $.browser.msie =/msie/.test (Navigator.userAgent.toLowerCase ());The expression after the equal sign returns the True/false, which can be used

When querying with query, the following configuration is usedvar querytask = new Esri.tasks.QueryTask (applicationmodelonesearchpoiurl); var query = new Esri.tasks.Query (); Query.geometry = geometry; Query.outspatialreference = map.spatialreference; Query.spatialrelationship = Esri.tasks.Query.SPATIAL_REL_INTERSECTS; Query.returngeometry = true; Querytask.execute (query, Applicationmodelonegetsearchdata, errorcallback);General us