JavaScript regular gets the img tag alt value code

When converting between the discuz! visual editor and the Ubb editor, such as

The code is as follows	Copy Code

But the content that IE gives is

The code is as follows	Copy Code

Good double quotes just give me eat, are you hungry?
The original use is re =/alt= (["']+)" ([ss]*?) (1)/I; to match out the alt value.
Results IE gives the content can not match, the key is not double quotes, and alt value has a bit arbitrary value, Firefox does not have this problem. is very depressed, have the opportunity to let me see the person who developed IE browser kernel, I must throw a lump of excrement to him, estimate each and JavaScript and each version of the browser big dealings with the peers have the idea of it:

The Final Solution is: Add a plus a regular

The code is as follows	Copy Code
Re =/alt= ([ss]*?) (>|s>|ssrc|sborder|swidth|sheight|s/>| ") /I;

To match the non-standard content generated by IE.

The detailed code is as follows:

The following ALT value is for the standard browser that is alt= "xxxx" with double quotation mark mode;

The code is as follows	Copy Code
Re =/alt= (["']+) ([ss]*?) (1)/I; var matches = re.exec (attributes); if (matches!= null) { var alt = matches[2]; if (alt.length) { Return ' [img= ' + src + '] ' + ALT + ' [/img] '; } }

The following ALT value is for non-standard browsers such as Dog Day ie, alt=xxxx, which is not enclosed in double quotes;

The code is as follows	Copy Code
Re =/alt= ([ss]*?) (>|s>|ssrc|sborder|swidth|sheight|s/>| ") /I; var matches = re.exec (attributes); if (matches!= null) { var alt = matches[1]; if (alt.length) { Return ' [img= ' + src + '] ' + ALT + ' [/img] '; } }

If you have any better way please be sure to tell me Oh!! ~~

PM Update:
Thanks to Blankyao's reminder, I found the attributes in front of the last is no > symbol
So the regular revision is changed to

code is as follows	copy code
re =/alt= ([SS] *?) (ssrc|sborder|swidth|sheight| ") /I;