【JS&Html】一些总结

一时失言乱红尘 2022-07-21 02:17 98阅读 0赞

*  **html里面 监听回车事件**
    
        监听回车，若回车按下，执行相应操作

--------------------

*  html DOM元素 获取或赋值

<!DOCTYPE html> 
    <head>    
        <title></title>
    </head>
    
    
    <script language="JavaScript"> document.getElementById("fpsw_question_id").innerHTML = "demo";// 获取<font>信息并赋值 </script>
    
    
    <td class="tdText">
        <font id="fpsw_question_id" name="fpsw_question"></font>
    </td>
    
    </html>

*  c 字符串分割
    
    str为要分割的字符串  
    delimiter 为分割字符  
    分割到内容存放到splite\_arry数组里

![这里写图片描述][20160921164006358]

类似于js里的

var arr = new Array();
    var tmp = "2420@1@you tel num?@1@453763leaq72";
    arr = tmp.split("@");

/*splite string, get tne answer to the use input(start) Like:2419@0@null@1@zzqgy splite_arry NUM Value 0 2419 1 0 2 null 3 1 4 zzqgy // this is the user answer */
    
    
    #include <stdio.h>
    #include <string.h>
    
    int main()
    {
        char str[1024] = "2419@0@null@1@zzqgy";
        char splite_arry[4][128]={
       0};
        char *delimiter = "@";
        char *token = strtok(str,delimiter);
        int i=0;
    
        while(token != NULL)
        {
            sprintf(splite_arry[i++], "%s", token);//strcpy(splite_arry[i++], token); //printf( "%s ", token );
            token = strtok(NULL,delimiter);
        }
    
        for(i = 0; i <= 4; i++)
        {
            printf("%d %s\n", i, splite_arry[i]);
        }
    /* char *stmp = "zzqgy"; if(strcmp(str, splite_arry[4]) == 0) { printf("ok\n"); }else { printf("off\n"); } */  
        return 0;
    }
    
    /* leo_lin@linux-4b5l:~/leo> ./test 0 2419 1 0 2 null 3 1 4 zzqgy leo_lin@linux-4b5l:~/leo> */

*  select

//获取select的下拉选项值，0为第一个元素标号 
    var obj_select = document.getElementById("selcetRenameID" + index);
    var select_index = obj_select.selectedIndex; // get select 下表号
    var select_index_value = obj_select.options[select_index].text;//下拉项的内容
    document.getElementById("selcetRenameID"+index).innerHTML =obj_select.options[select_index].text;
    //将下拉框的内容赋值到("selcetRenameID"+index)里面，("selcetRenameID"+index)为<font>的ID

Disable 项

[20160921164006358]: /images/20220720/d8abe782a77449419fefbdc46eed58e9.png