Help with my Title screen - Error CS1023 and Error 0246

I need help with this title screen I'm making for my game. First of all I'm a newbie and I am making this title screen using methods I've gathered from different sources. I keep getting error CS1023 (49,36) and error 0246 (26,9). I don't know whats wrong on line 49 and 26. What this code is basically supposed to do is hide a RawImage on the Canvas upon a keypress so that a different RawImage will be revealed, then when the second RawImage image is being displayed background music should start playing. Also if you see a better method than what I'm doing (or trying to do) please give it to me. The variable names are arbitrary by the way and have no real significance.

using UnityEngine; using System.Collections;

public class splash : MonoBehaviour {

 // Use this for initialization
 void Start () {
 
 }
 
 private string splashcurr ="notyet";
 private string titlestate ="no";
 public float splash_count = 4.0f;
 private AudioSource source1;
 
 // Update is called once per frame
 void Update () {
     if (splash_count <= 0.0f)
     splashcurr ="summon";
     else
     splash_count -= Time.deltaTime;
 }
 
 // Checks for keypress
 function Update() {
     if(Input.GetMouseButtonDown(0))
         splashcurr ="summon";
     if(Input.GetKeyDown (KeyCode.Space)){
         if (splashcurr="summon")
         splashcurr="ontitle";
         else
         splashcurr ="summon";
     }
     if(Input.GetKeyDown (KeyCode.Return))
         splashcurr ="summon";
     
     call SplashCheck;
 }
 
 // Code for checking and clicking between splashes
 void SplashCheck () {
     if(splashcurr="summon") {
         renderer.enabled=false= Gameobject.Find("IEntertain");
         splashcurr ="ontitle";
     }
     
     if(splashcurr="ontitle") {
         titlestate="now";
         Quethemusic;
     }
 }
 
 void Quethemusic () {
     if (titlestate="now")
         source1.Play();
 }

}