不同浏览器中JS兼容_1（国外英文资料）.docVIP

不同浏览器中JS兼容_1（国外英文资料） JS compatibility issues in different browsers The problem of document.formname.item ( itemName ) is the problem Note: under IE, you can use document.formname.item ( itemName ) or document.formname.elements [ elementName ]; Under Firefox, you can only use document.formname.elements [ elementName ]. Solution: unify the document.formname.elements [ elementName ]. Class object problems Note: under IE, you can use () or [] to obtain collection class objects; In Firefox, you can only use [] to get the collection class object. Solution: use the [] to get the collection class object. Custom property issues Note: under IE, you can use the method to obtain custom properties, or you can use getAttribute () to get custom properties; Under Firefox, you can only use getAttribute () to get custom properties. Solution: unify the custom properties through getAttribute (). Eval ( idName ) problem Note: under IE, you can use eval ( idName ) or getElementById ( idName ) to obtain an HTML object with an id of idName; Firefox can only use getElementById ( idName ) to get an HTML object with an id of idName. Solution: use getElementById ( idName ) to obtain an HTML object with an id of idName. The variable name is the same problem as an HTML object ID Note: under IE, the ID of the HTML object can be used directly as the name of the subordinate object of the document; Under Firefox, you can use the same variable name as the HTML object ID. IE cannot do. Solution: use document.getelementbyid ( idName ) instead of document.idname. It is best not to take the same variable name as the HTML object ID to reduce the error; When you declare variables, add the var to avoid ambiguity. 6. The problem of const Note: for Firefox, you can define constants using the const keyword or the var keyword. Under IE, you can only define constants using the var keyword. Solution: use the var keyword to define constants. The input.type attribute problem Note: the input.type attribute in IE is